北祁连造山带西段的外来移置体

Allochthones along the West Section of the North Qilian Orogenic Belt

北祁连造山带西段发育有许多外来移置体,本文论述了其物质组成、构造样式、运动学及动力学特征。揭示了研究外来移置体对正确重建造山带构造演化中的重要意义。认为研究外来移置体,不仅可以在恢复造山带古地理占构造格局时排除干扰,而且对探讨造山带造山过程中动力学的转换都有重要的意义。

Allochthones are well developed along the west section of the North Qilian orogenic belt. These allochthones can be divided into two types; nappe and slide nappe. In this paper,the material composition, structural style, kinematics and dynamics of these allochthones have been discussed. It is pointed out that the study of the allochthone has great significanae for the correct reconstruction of paleogeographic and paleotectonic frameworks of orogenic belt and the study of dynamic transposition in the orogenic process of the orogenic belt.